(INAH)NARIGUA, MEXICO—Some 8,000 petroglyphs have been catalogued in northern Mexico, in an area that may soon be open to tourists. Archaeologist Gerardo Rivas of Mexico’s National Institute of Archaeology and History says that the many images were etched some 6,000 years ago by hunter-gatherers, and may represent initiation rites or stars. Evidence of temporary settlements have also been found in the area.